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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 692 (AIR CONDITIONING SYSTEM DIAGNOSTICS)DTC 22: COMPRESSOR LOCK SENSOR CIRCUITINSPECTION PROCEDURE
2004 Toyota Matrix XR, FWD, Standard

Inspection Procedure

2004 Toyota Matrix XR, FWD, StandardSECTION Inspection Procedure
WARNING: This page is about a different car, the 2004 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK COOLER COMPRESSOR ASSY 
    1. Check and adjust compressor drive belt tension (see INSPECTION ).
    2. Check if the cooler compressor does not lock when starting the engine and turning the A/C switch on.

      OK: Cooler compressor assy does not lock during operations 

    If the compressor drive belt slips when A/C switch is turned on, the magnet clutch seems to be locked. If the condition continues for more than 3 seconds, the A/C amplifier turns off the magnet clutch for compressor drive belt protection.

    1. NG: REPLACE COOLER COMPRESSOR ASSY 
    2. OK: Go to Next Step. 
  2. INSPECT ECM (LCK1 - BODY GROUND) 
    1. Remove the ECM with the connectors still connected.
    2. Start the engine and push the AUTO switch.
    3. Measure the waveform according to the condition(s) in WAVEFORM MEASURING CONDITION  .

      OK: 

      WAVEFORM MEASURING CONDITION

      Tester connection Condition Specified condition
      E6-23 (LCK1) - Body ground Ignition switch ON AUTO switch ON Waveform operate as shown in Fig 2
      Fig 1: Identifying ECM LCK1 Terminal
      G03036742Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Result: 

    ECM (LCK1 - BODY GROUND) INSPECTION RESULT

    NG A
    OK (Checking from the PROBLEM SYMPTOMS TABLE) B
    OK (Checking from the DTC) C
    Fig 2: Waveform Graph
    G03036743Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE  TERMINALS OF ECU  ) 
    2. C: Go to step   5 
    3. A: Go to Next Step. 
  3. INSPECT A/C LOCK SENSOR (COOLER COMPRESSOR ASSY) 
    1. Disconnect the A/C lock sensor (cooler compressor assy) connector.
    2. Measure the resistance according to the value(s) in A/C LOCK SENSOR (COOLER COMPRESSOR ASSY) RESISTANCE  .

      Standard: 

      A/C LOCK SENSOR (COOLER COMPRESSOR ASSY) RESISTANCE

      Tester connection Condition Specified condition
      1 - 2 at 20°C (68°F) 165 to 205 Ω
      Fig 3: Identifying Terminals Of A/C Lock Sensor Connector
      G03036744Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE A/C LOCK SENSOR (COOLER COMPRESSOR ASSY) 
    2. OK: Go to Next Step. 
  4. CHECK HARNESS AND CONNECTOR (A/C LOCK SENSOR (COOLER COMPRESSOR ASSY) - ECM) (SEE  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ) 
    1. Measure the resistance according to the value(s) in A/C LOCK SENSOR (COOLER COMPRESSOR ASSY) - ECM) RESISTANCE  .

      Standard: 

      A/C LOCK SENSOR (COOLER COMPRESSOR ASSY) - ECM) RESISTANCE

      Tester connection Condition Specified condition
      A2-1 - E6-23 (LCK1) Always Below 1 Ω
      A2-2 - Body ground Always Below 1 Ω
      A2-1 - Body ground Always 10 kΩ or higher
      E6-23 (LCK1) - Body ground Always 10 kΩ or higher
      Fig 4: Identifying Terminals Of A/C Lock Sensor Connector
      G03036745Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.